Effects of different types of titanium dioxide on powder coatings

China Paint Online News Information: Titanium white powder is a white pigment commonly used in white polyester epoxy powder coatings. Select the commonly used white polyester epoxy powder coating formulation for comparative testing of different types of titanium powder A0101, R940, R902, R244, R930 and R706.
Different types of titanium dioxide, due to different manufacturing processes, crystalline and surface treatment methods, their chemical composition and properties are different, the chemical reaction activity and dispersion of polyester epoxy powder coatings have different effects on the powder coating gel time and melting level flow has a significant impact on the film fluidity, gloss, color difference and impact resistance. The powder coating made of sharp titanium-type titanium dioxide powder (A0101) is more active than the powder coating made of redstone type (R-type) titanium white powder, the gel time is short, the melting level is small, the coating film flatness is poor, the gloss is low. There are also significant differences in the technical indicators between the redstone-type titanium dioxide powder. Therefore, according to the requirements of powder coating performance, it is important to choose a variety of titanium dioxide that can meet the performance requirements of powder coating and coating film. In the anti-light polyester epoxy powder coating, the sharp titanium-type titanium white powder is more likely to make the coating film color or yellowing than the gold-redstone titanium white powder, so this coating system is best to use the gold-redstone titanium white powder.